@article{10_4153_CJM_1972_121_x,
     author = {Kohli, J. K.},
     title = {A {Note} on {Open} {Extension} of {Maps}},
     journal = {Canadian journal of mathematics},
     pages = {1139--1144},
     year = {1972},
     volume = {24},
     number = {6},
     doi = {10.4153/CJM-1972-121-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-121-x/}
}